Offices of Deloitte are seen in London, Britain, September 25, 2017. REUTERS/Hannah McKay - RC1614FC2010

(Reuters) - Deloitte on Tuesday reported a nearly 6 percent increase in full-year revenue in Britain and Switzerland, driven by growth in its audit and risk advisory segment.

Deloitte said it had also launched legal services in Britain, moving onto turf of traditional law firms.

Earnings and market share at Deloitte, EY, PwC and KPMG, the “Big Four” accounting firms, have come under political scrutiny, with the industry in Britain set to voluntarily propose this week market share limits for the firms.

“The audit profession has faced significant scrutiny in the past year, with concerns raised over quality, conflicts of interest and a lack of choice,” David Sproul, senior partner and chief executive of Deloitte North West Europe, said in a statement.